Validate negative and positive decimal numbers with RegEx

Question

I am trying to build a regex which will allow both negative and positive decimal numbers with the following rules.

1. there can not be more than 2 digits after de

Answer 1

var NumberToValidate = 48428;
        var valid =  /^([0-9]*[1-9][0-9]*)$/.test(NumberToValidate);
        {
        if (!valid)
    alert("Invalid Quantity!!\nThe Quantity cannot be Zero\n or a part of a Unit !");
            return false;
        }